/*
==============================================================================
Copyright (c) 2016-2019, rryqszq4 <rryqszq@gmail.com>
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
==============================================================================
*/

#include "ngx_http_php_module.h"
#include "ngx_http_php_request.h"
#include "ngx_http_php_core.h"
#include "ngx_http_php_handler.h"

int 
ngx_http_php_request_read_body(ngx_http_request_t *r)
{
    ngx_int_t rc;
    ngx_http_php_ctx_t *ctx = ngx_http_get_module_ctx(r, ngx_http_php_module);

    if (r->method != NGX_HTTP_POST && r->method != NGX_HTTP_PUT){
        //php_error(E_WARNING, "can't read body");
        return NGX_OK;
    }

    r->request_body_in_single_buf = 1;
    rc = ngx_http_read_client_request_body(r, ngx_http_php_request_read_body_cb);

    if (rc == NGX_ERROR || rc >= NGX_HTTP_SPECIAL_RESPONSE){
        //php_error(E_WARNING, "ngx_http_read_client_request_body failed");
        return rc;
    }

    if (rc == NGX_AGAIN){
        ctx->request_body_more = 1;

        return NGX_DONE;
    }

    return rc;
}

void 
ngx_http_php_request_read_body_cb(ngx_http_request_t *r)
{
    ngx_chain_t *cl;
    size_t len;
    u_char *p;
    u_char *buf;

    ngx_http_php_ctx_t *ctx = ngx_http_get_module_ctx(r, ngx_http_php_module);

    if (r->request_body == NULL || r->request_body->bufs == NULL){
        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "This pahse don't have request_body");
        ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
        return ;
    }

    if (r->request_body->temp_file){
        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "temp_file: %s", r->request_body->temp_file->file.name.data);
        ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
    }

    cl = r->request_body->bufs;

    if (cl->next == NULL){
        len = cl->buf->last - cl->buf->pos;
        if (len == 0){
            return ;
        }

        ctx->request_body_ctx.data = cl->buf->pos;
        ctx->request_body_ctx.len = len;
        ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, "request_body(%d|%d): %V", len, strlen((char *)ctx->request_body_ctx.data), &ctx->request_body_ctx);
        if (ctx->request_body_more){
            ctx->request_body_more = 0;
            ngx_http_finalize_request(r, ngx_http_php_content_post_handler(r));
        }else {
            ngx_http_finalize_request(r, NGX_DONE);
        }
        return ;
    }

    len = 0;
    for (; cl; cl = cl->next){
        len += cl->buf->last - cl->buf->pos;
    }

    if (len == 0){
        return ;
    }

    buf = ngx_palloc(r->pool, len);
    p = buf;
    for (cl = r->request_body->bufs; cl; cl = cl->next){
        p = ngx_copy(p, cl->buf->pos, cl->buf->last - cl->buf->pos);
    }

    ctx->request_body_ctx.data = buf;
    ctx->request_body_ctx.len = len;
    ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, "multi request_body(%d|%d): %V", len, strlen((char *)ctx->request_body_ctx.data), &ctx->request_body_ctx);
    if (ctx->request_body_more){
        ctx->request_body_more = 0;
        ngx_http_finalize_request(r, ngx_http_php_content_post_handler(r));
    }else {
        ngx_http_finalize_request(r, NGX_DONE);
    }

    return ;

    /*ngx_http_php_ctx_t *ctx = ngx_http_get_module_ctx(r, ngx_http_php_module);
    u_char *p;
    u_char *data;
    size_t len;
    ngx_buf_t *buf, *next;
    ngx_chain_t *cl;
    if (r->request_body == NULL || r->request_body->bufs == NULL){
        ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
        return ;
    }
    if (r->request_body->temp_file){
        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "temp_file: %s", r->request_body->temp_file->file.name.data);
        //body = r->request_body->temp_file->file.name;
        ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
        return ;
    }else {
        cl = r->request_body->bufs;
        buf = cl->buf;
        if (cl->next == NULL){
            len = buf->last - buf->pos;
            p = ngx_pnalloc(r->pool, len + 1);
            if (p == NULL){
                ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
                return ;
            }
            data = p;
            ngx_memcpy(p, buf->pos, len);
            data[len] = 0;
        } else {
            next = cl->next->buf;
            len = (buf->last - buf->pos) + (next->last - next->pos);
            p = ngx_pnalloc(r->pool, len + 1);
            data = p;
            if (p == NULL){
                ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
                return ;
            }
            p = ngx_cpymem(p, buf->pos, buf->last - buf->pos);
            ngx_memcpy(p, next->pos, next->last - next->pos);
            data[len] = 0;
        }
    }
    ctx->request_body_ctx.data = data;
    ctx->request_body_ctx.len = len;
    ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, "multi request_body(%d|%d): %s", len, strlen((char *)ctx->request_body_ctx.data), ctx->request_body_ctx.data);
    if (ctx->request_body_more){
        ctx->request_body_more = 0;
        ngx_http_finalize_request(r, ngx_http_php_content_post_handler(r));
    }else {
        ngx_http_finalize_request(r, NGX_DONE);
    }*/
}

ngx_str_t 
ngx_http_php_request_get_request_body(ngx_http_request_t *r)
{
    u_char *p;
    u_char *data;
    size_t len;
    ngx_buf_t *buf, *next;
    ngx_chain_t *cl;
    ngx_str_t body = ngx_null_string;

    if (r->request_body == NULL || r->request_body->bufs == NULL){
        return body;
    }

    if (r->request_body->temp_file){
        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "temp_file: %s", r->request_body->temp_file->file.name.data);
        body = r->request_body->temp_file->file.name;
        return body;
    }else {
        cl = r->request_body->bufs;
        buf = cl->buf;

        if (cl->next == NULL){
            len = buf->last - buf->pos;
            p = ngx_pnalloc(r->pool, len + 1);
            if (p == NULL){
                return body;
            }
            data = p;
            ngx_memcpy(p, buf->pos, len);
            data[len] = 0;
        } else {
            next = cl->next->buf;
            len = (buf->last - buf->pos) + (next->last - next->pos);
            p = ngx_pnalloc(r->pool, len + 1);
            data = p;
            if (p == NULL){
                return body;
            }
            p = ngx_cpymem(p, buf->pos, buf->last - buf->pos);
            ngx_memcpy(p, next->pos, next->last - next->pos);
            data[len] = 0;
        }
    }

    body.len = len;
    body.data = data;
    return body;
}

void 
ngx_http_php_request_init(ngx_http_request_t *r TSRMLS_DC)
{
    ngx_http_headers_in_t *headers_in;
    headers_in = &r->headers_in;

    ngx_list_part_t *part = &r->headers_in.headers.part;
    ngx_table_elt_t *header = part->elts;

    ngx_uint_t i;

    if (r->method == NGX_HTTP_GET){
        SG(request_info).request_method = "GET";
    } else if (r->method == NGX_HTTP_POST){
        SG(request_info).request_method = "POST";

        char *content_type = (char *)headers_in->content_type->value.data;
        SG(request_info).content_type = content_type;
    }

    if (r->args.len > 0){
        SG(request_info).query_string = emalloc(r->args.len+1);
        ngx_cpystrn((u_char *)SG(request_info).query_string, r->args.data, r->args.len+1);

    }

    ngx_http_php_request_context_t *context;
    context = emalloc(sizeof(ngx_http_php_request_context_t));
    context->cookie_data = NULL;

    for (i = 0; /* void */; i++){
        if (i >= part->nelts){
            if (part->next == NULL){
                break;
            }
            part = part->next;
            header = part->elts;
            i = 0;
        }

        if (ngx_strncasecmp(header[i].lowcase_key, (u_char *)"cookie", header[i].key.len) == 0){
            context->cookie_data = emalloc(header[i].value.len + 1);
            ngx_cpystrn((u_char *)context->cookie_data, header[i].value.data, header[i].value.len + 1);
        }

    }

    //context->r = r;

    SG(server_context) = context;

    //ngx_http_php_request_read_body(r);
}

void 
ngx_http_php_request_clean(TSRMLS_D)
{
    if (SG(request_info).query_string){
        efree(SG(request_info).query_string);
        SG(request_info).query_string = NULL;
    }

    if (SG(server_context)){
        ngx_http_php_request_context_t *context;
        context = SG(server_context);
        if (context->cookie_data){
            efree(context->cookie_data);
            context->cookie_data = NULL;
        }
        
        efree(SG(server_context));
        SG(server_context) = NULL;
    }

}
